package com.android.core.utils;

import android.app.Activity;

import com.android.core.utils.log.Logger;

import java.util.Stack;

/**
 *
 */

public class AppManager {

    private static Stack<Activity> activityStack;

    private AppManager() {
        activityStack = new Stack<>();
    }

    /**
     * 单一实例
     */
    public static AppManager getAppManager() {
        return SingleModeHolder.instance;
    }

    private static class SingleModeHolder {
        private static final AppManager instance = new AppManager();

        private SingleModeHolder() {
        }
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        activityStack.add(activity);
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        return activityStack.lastElement();
    }

    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        Activity activity = activityStack.lastElement();
        finishActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null && !activity.isFinishing()) {
            activityStack.remove(activity);
            activity.finish();
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        for (Activity activity : activityStack) {
            if (activity.getClass().equals(cls)) {
                finishActivity(activity);
                break;
            }
        }
    }

    /**
     * 结束所有Activity
     */
    private void finishAllActivity() {
        for (int i = 0, size = activityStack.size(); i < size; i++) {
            if (null != activityStack.get(i)) {
                finishActivity(activityStack.get(i));
            }
        }
        activityStack.clear();
    }

    /**
     * 获取指定的Activity
     */
    public static Activity getActivity(Class<?> cls) {
        if (activityStack != null)
            for (Activity activity : activityStack) {
                if (activity.getClass().equals(cls)) {
                    return activity;
                }
            }
        return null;
    }

    /**
     * 退出应用程序
     */
    public void appExit() {
        try {
            finishAllActivity();
//            android.os.Process.killProcess(android.os.Process.myPid());
        } catch (Exception e) {
            Logger.i(e.getMessage(), e);
        }
    }
}
